Thanks for the query,
You might be suffering from a sebaceous cyst
It is usually seen in hairy area and often symptomless.
Sometimes a cheesy material comes out on pressing.
Just try to do this.
surgery under antibiotic cover is the only treatment option.
Please meet a dermatologist
for final diagnosis and treatment
Let me know if you have any other doubt.
you can ask a direct question to me on this forum, following the below link.
Wishing you a good health.